lug

A handle or projection used as a hold or support.

A lug nut.

A lugsail.

A projecting part of a larger piece that helps to provide traction, as on a tire or the sole of a boot.

A copper or brass fitting to which electrical wires can be soldered or otherwise connected.

A clumsy fool; a blockhead.

To drag or haul (an object) laboriously.

To pull or drag with short jerks.

To cause (an engine, for example) to run poorly or hesitate.

To pull something with difficulty; tug.